Answer:
28
Step-by-step explanation:
So in order to get this answer you want to use the combination formula which is 
Now you want to use the numbers given to you in the problem which is ₈C₂ and plug those into the equation
so your going to have something looking like this 
now if you have a calculator nearby and you plug in ₈C₂ your going to get 28 which is the answer.
hope this somewhat helps.
Answer:x is equal to 2. Hope this is helpful
Step-by-step explanation:
do you mean 2x squared? If so, x = 5, -5
3 to the negative second power is written like this:
.
When simplifying an expression with a negative exponent, you take a positive version of the exponent, in this case that would be 2, and apply that to the base.
After doing that, we have 9.
The next step is to put one over that number.
In this case, now after doing that the answer is
.
Hope this helps!
